Places pay for this service. A place I used to work (briefly) paid for this service. It was super annoying! One day a colleague showed me a little known secret to turn it off and made my life immeasurably better.
I now share this little nugget with you:

Step 1) Open a browser.

Step 2) Type in the URL of an offending site.

Step 3) add ?disableTracer=on to the end of the URL. (example: http://www.businessinsider.com?disableTracer=on)

Step 4) Press Enter.

Step 5) You’re done!

You’ll have to do this for every browser you use and every site, but trust me, if you visit one of these sites often, it’s worth it.

UPDATE: An even easier way to turn this off for all websites is to go here, and just click “opt out.” You’ll still have to do it in each browser but you won’t have to do it for every site. (Thanks to indispensable friend Stefan Becket for the tip.)

Fact:

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Ben Dreyfuss is Mother Jones' editorial director for growth and strategy. He's done some other stuff, too. You can email him at bdreyfuss@motherjones.com. But you don't have to. But you can. But you really don't have to.